package com.jsd.demo1;

import java.lang.reflect.Array;
import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * @author jsd
 */
public class ListTest {

    public static void main(String[] args) {

        /**
         *  1. List<String> list = new Vector<>();
         *  2. List<String> list = Collections.synchronizedList(new ArrayList<>());
         *  3. List<String> list = new CopyOnWriteArrayList<>();
         *
         *
         */
        List<String> list = new CopyOnWriteArrayList<>();

        for (int i = 0; i < 10; i++) {
            new Thread(() -> {
                list.add(UUID.randomUUID().toString().substring(0, 5));
                System.out.println(list);
            }).start();
        }
    }
}
